Premier Plastic Injection Molding & Manufacturing in Grand Rapids, MI
Ronningen is proud to provide high-quality plastic injection molding and manufacturing services to businesses in Grand Rapids, Michigan. With over 50 years of experience, we specialize in delivering precision-molded plastic parts for a wide variety of industries, including automotive, medical devices, aerospace, and consumer electronics. Our facility is equipped with advanced injection molding technology that ensures high-quality parts with fast, reliable delivery.
In addition to injection molding, we offer an extensive range of secondary services, including over molding, insert molding, ultrasonic welding, electroplating, and custom packaging. These services streamline production, reduce lead times, and guarantee that each part meets your functional, aesthetic, and performance requirements. Ronningen is your trusted partner in Grand Rapids, offering cost-effective, efficient manufacturing solutions that drive success.
Comprehensive Plastic Manufacturing Services for Grand Rapids Industries
Ronningen offers a complete suite of plastic manufacturing services designed to meet the unique needs of businesses in Grand Rapids. Our plastic injection molding services include everything from traditional injection molding to more advanced processes like over molding, insert molding, and structural foam molding. We work with various materials, including engineered resins and thermoplastics, to ensure that every part is durable, high-performing, and cost-effective.
In addition to molding, we provide essential secondary services such as machining, leak testing, custom cutting, and pad printing. All of these services are completed in-house to streamline the production process and reduce lead times. With Ronningen, you can expect precision, efficiency, and the highest quality, ensuring your project is delivered on time and meets your expectations.
Precision Manufacturing and Advanced Technology for Grand Rapids, MI
Ronningen combines precision plastic injection molding technology with advanced engineering to deliver high-quality parts for businesses in Grand Rapids. Our team uses high-tonnage machines and state-of-the-art molding technology to ensure that each part is produced with the utmost accuracy and durability. Whether your project requires complex multi-material parts or high-volume production, we have the capabilities to meet your needs.
In addition to injection molding, we provide a full range of secondary services such as ultrasonic welding, machining, and leak testing. These services help ensure that your parts are both functional and aesthetically appealing. Our integrated manufacturing process helps streamline production, reduce costs, and improve efficiency, ensuring that your parts meet the highest quality standards.
Why Grand Rapids, MI Manufacturers Choose Ronningen
Ronningen is the go-to choice for Grand Rapids, MI manufacturers because of our comprehensive plastic injection molding services and our commitment to high-quality production. Our capabilities include everything from precision molding and tooling to secondary operations like machining, electroplating, and part marking. We work closely with our clients to ensure that every part meets their exact specifications and performance requirements.
We specialize in advanced molding techniques such as over molding, insert molding, and structural foam molding, which enable us to produce durable, lightweight, and complex parts. Our in-house capabilities for machining, leak testing, and custom packaging ensure that we can deliver fully finished parts ready for immediate use. Ronningen’s integrated approach reduces lead times, lowers costs, and helps streamline the manufacturing process.
Fast and Efficient Plastic Manufacturing Solutions for Grand Rapids, MI
Ronningen’s Grand Rapids facility is designed to provide fast and reliable plastic injection molding services for local businesses. Whether you need quick-turn prototypes, small production runs, or high-volume manufacturing, we offer flexible solutions to meet your specific production needs. Our team is committed to delivering high-quality parts on time, ensuring that your production schedules are met without delay.
In addition to injection molding, we offer secondary services such as machining, leak testing, part marking, and packaging. By offering all of these services in-house, we reduce the complexity of the production process and provide you with a one-stop solution for all your manufacturing needs. Ronningen’s commitment to speed, efficiency, and quality makes us the trusted choice for businesses in Grand Rapids.
Ronningen R&D: Premier Plastic Injection Molding in Grand Rapids, MI




Our ISO 9001 certified quality management system is registered and certified by NSF International Strategic Registrations and based on a number of quality management principles including:
- A strong customer focus
- Support of top management
- Adherence to a process approach
- Continual improvement
Under the scope of our registration are the following services:
- Prototype plastic injection tooling for molded parts
- Engineering evaluation samples
- Pilot and production plastic components
Our accreditation from NSF provides assurance to our customers that our certified components and products comply with the technical requirements of ISO 9001.
QMMY2.E116158 Fabricated Parts – Component
Underwriters Laboratories is an independent product safety testing and certification organization working for public safety since 1894. Since its founding, U/L has held the reputation as the undisputed leader in product safety and certification, giving consumers peace of mind about the products they use.
("ITAR," 22 CFR 120-130) REGISTERED
All manufacturers of defense articles, related data, and defense services as defined on the United States Munitions List (Part 121 of ITAR) are required to register with the Directorate of Defense Trade Controls (DDTC). ITAR registration is a means to provide the U.S. Government with necessary information on who is involved in certain manufacturing, brokering, and exporting activities.
(MBP3)
Commitment to our air, land, and water quality is paramount at Ronningen. Since 1999, we've served as a Michigan Business Pollution Protection Partner, adopting pollution prevention policies, committing to reductions, and sharing our successes with other MBP3 members.
Our Comprehensive Manufacturing Services: Plastic Injection Molding & More
Assembly & Sub-Assembly
At Ronningen Research and Development, we provide expert Assembly & Sub-Assembly services for seamless integration of components. Whether it's simple assemblies or complex multi-part solutions, we ensure precision and efficiency in every process.
Custom Coloration
Our Custom Coloration services offer tailored color options to meet your design and branding needs. We use advanced Plastic Injection Molding techniques to ensure long-lasting, consistent colors for your products.
Custom Cutting Parts
Ronningen Research and Development specializes in Custom Cutting Parts using state-of-the-art machinery. We provide accurate cuts for a variety of materials, meeting the specific needs of your project.
Drilling
We offer high-precision Drilling services to create exact holes in various materials. Our advanced equipment ensures accuracy and quality for projects requiring tight tolerances and consistent results.
Electroplating
Our Electroplating services enhance part durability and corrosion resistance with high-quality metallic coatings. We provide superior finishes for applications in automotive, electronics, and more.
Heat Staking
Heat Staking at Ronningen Research and Development creates strong, reliable bonds between plastic components without the need for additional materials. This process is ideal for parts requiring secure assembly and durability.
Hot Stamping
Hot Stamping services provide a high-quality finish with precision and efficiency. We use advanced techniques to apply logos, designs, and text to parts, ensuring a clean and lasting imprint.
Insert Molding
Insert Molding allows us to mold plastic around metal or other materials to create strong, integrated components. This service provides enhanced functionality and durability for complex applications.
Labeling
We provide precise Labeling services that ensure clear, durable markings for traceability, branding, and compliance. Our labeling process guarantees that your parts are correctly identified and meet industry standards.
Leak Testing
Our Leak Testing services verify the integrity of your products, ensuring they meet safety standards. We provide airtight and watertight testing to prevent failures and guarantee quality.
Machining
We offer high-precision Machining services for custom parts. Using advanced CNC equipment, we deliver consistent, high-performance components for a variety of industries.
Milling
Our Milling services create intricate parts with high accuracy. We use advanced equipment to ensure precise cuts and finishes for your custom projects.
Over Molding
Over Molding at Ronningen Research and Development creates multi-material components for enhanced durability and functionality. We mold plastic over existing parts to meet complex design requirements.
Packaging, Custom
Our Custom Packaging services protect your products during transportation and storage. We offer tailored solutions to ensure your parts arrive safely and in excellent condition.
Pad Printing
We provide Pad Printing services for high-quality markings on various materials. Ideal for branding, labeling, and customization, our process ensures precise, durable prints.
Over Molding
Over Molding at Ronningen Research and Development creates multi-material components for enhanced durability and functionality. We mold plastic over existing parts to meet complex design requirements.
Packaging, Custom
Our Custom Packaging services protect your products during transportation and storage. We offer tailored solutions to ensure your parts arrive safely and in excellent condition.
Pad Printing
We provide Pad Printing services for high-quality markings on various materials. Ideal for branding, labeling, and customization, our process ensures precise, durable prints.
Part Marking
Our Part Marking services at Ronningen Research and Development ensure clear and accurate markings for identification and traceability. We use advanced techniques to apply markings that meet industry standards.
Painting
At Ronningen Research and Development, our Painting services enhance the aesthetic and protective qualities of your parts. We apply durable coatings for both functional and cosmetic purposes.
Silk-screening
We offer Silk-screening services at Ronningen Research and Development for durable, high-quality prints on parts. This process is ideal for logos, designs, and labels, providing precise results for a variety of materials.
Shielding
Our Shielding services at Ronningen Research and Development protect components from electromagnetic interference. We use advanced materials and techniques to ensure reliable performance and compliance with industry standards.
Shipping
At Ronningen Research and Development, we handle Shipping with care, ensuring that your products are securely packaged and delivered on time. Our reliable shipping services help you get your products to the market quickly and safely.
Spin Welding
Spin Welding services at Ronningen Research and Development provide strong, durable bonds for plastic parts. This technique is ideal for creating seamless joints without the need for additional materials.
Structural Foam Molding
We offer Structural Foam Molding at Ronningen Research and Development for lightweight, durable plastic parts. This service provides strong components with a reduced weight, ideal for applications that require high strength without the added bulk.
Taping
Our Taping services at Ronningen Research and Development are designed to provide secure adhesion and protection for your products. We offer custom taping solutions to meet the needs of various industries.
Trimming
At Ronningen Research and Development, we provide Trimming services to finish and refine your parts. Our precise trimming process ensures clean edges and perfect finishes for your molded components.
Ultrasonic Welding
Ultrasonic Welding at Ronningen Research and Development uses high-frequency sound waves to create strong, precise bonds between plastic parts. Ideal for delicate applications, this process ensures high-quality, durable results without the need for adhesives.
Frequently Asked Questions About Plastic Injection Molding in Grand Rapids, MI
At Ronningen, we receive numerous questions about our plastic injection molding services and how we can help businesses in Grand Rapids, MI. Below are answers to the most frequently asked questions. Our goal is to provide you with all the information you need to make an informed decision about your manufacturing needs. We’re here to help guide you through every step of the process.
Q1: What types of plastic injection molding services does Ronningen offer in Grand Rapids?
Ronningen offers a wide range of plastic injection molding services, including traditional injection molding, over molding, insert molding, and structural foam molding. Additionally, we provide secondary services such as machining, electroplating, pad printing, and part marking. Our all-in-one approach ensures that your parts are produced efficiently and meet the highest quality standards.
Q2: Can Ronningen handle both small prototypes and large-scale production?
Yes, Ronningen is equipped to handle both small-batch prototypes and large-scale production runs. Our flexible production systems allow us to efficiently scale production to meet your needs. Whether you need a few hundred parts for testing or millions for full-scale production, we ensure consistent quality and precision for all volumes.
Q3: How does Ronningen ensure the quality of molded parts?
We follow ISO 9001:2015 certified quality management processes and utilize advanced inspection systems, including CMMs, vision cameras, and leak testers. Our quality control team monitors each part throughout the production process to ensure it meets your exact specifications and performs reliably in its intended application.
Q4: What materials does Ronningen work with for plastic injection molding?
Ronningen works with a variety of materials, including polypropylene, ABS, polycarbonate, and high-performance resins. Our team helps you select the best material based on your part’s functional requirements, durability, and environmental conditions. We also offer custom coloration to meet your design specifications and enhance the appearance of your parts.
Q5: Does Ronningen offer prototype injection molding services?
Yes, Ronningen specializes in prototype injection molding. Our rapid prototyping services allow you to test and refine your designs before full-scale production. We work closely with you to ensure that the prototype meets your performance and aesthetic requirements, helping you avoid costly mistakes during the production phase.